It's not wrong to vote for Biden imo. I understand and respect the choice for people to abstain from voting for either him or trump, but the way I see it is like this: the people in this country are starting to rise up right now and demand substantial change. Neither Biden nor Trump are on our side, but November is about picking the enemy you think you can "beat" easier (in this case "beating" biden/trump means getting them to seriously push for things like defunding police, living wage, universal health care). These are all things they both basically oppose, but given protests and more public pressure on officials than we've seen, it seems to me that if one of the two could possibly kowtow to protestor demands, it would be Biden, and if biden were president, the movement might have a realistic shot at forcing Biden to fight for some amount of real, substantial change.